Every month, the poker770 points you get receive a boost according to your VIP level (you can look here NetBet Poker VIP Club for some information about the boost etc). So, a lot of these points are propably coming from this boost.

You could also look at how many pokerstrategy points you got since you started playing at poker770 (without the 10 pokerstrategy points per day boost) and calculate how much money you raked.